Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUE MEASUREMENTS - Schedule of Inputs Used In Valuing Residential Mortgage Loans, Consumer Loans, Derivatives, and Mortgage Backed Securities (Details)

v3.21.2
FAIR VALUE MEASUREMENTS - Schedule of Inputs Used In Valuing Residential Mortgage Loans, Consumer Loans, Derivatives, and Mortgage Backed Securities (Details)
$ in Thousands
Sep. 30, 2021
USD ($)
Residential Mortgage Loans Held-for-Sale, At Fair Value  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans held-for-sale, fair value $ 1,822,554
Residential Mortgage Loans, Held-for-Investment, at Fair Value  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans, held-for-investment, fair value $ 595,012
Residential Mortgage Loans, Held-for-Investment, at Fair Value | Minimum | Discount Rate  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans held for investment, measurement input 0.064
Residential Mortgage Loans, Held-for-Investment, at Fair Value | Minimum | Prepayment Rate  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans held for investment, measurement input 0.019
Residential Mortgage Loans, Held-for-Investment, at Fair Value | Minimum | Delinquency  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans held for investment, measurement input 0.021
Residential Mortgage Loans, Held-for-Investment, at Fair Value | Minimum | Loss Severity  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans held for investment, measurement input 0.384
Residential Mortgage Loans, Held-for-Investment, at Fair Value | Maximum | Discount Rate  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans held for investment, measurement input 0.075
Residential Mortgage Loans, Held-for-Investment, at Fair Value | Maximum | Prepayment Rate  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans held for investment, measurement input 0.114
Residential Mortgage Loans, Held-for-Investment, at Fair Value | Maximum | Delinquency  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans held for investment, measurement input 0.158
Residential Mortgage Loans, Held-for-Investment, at Fair Value | Maximum | Loss Severity  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans held for investment, measurement input 0.570
Residential Mortgage Loans, Held-for-Investment, at Fair Value | Weighted Average | Discount Rate  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans held for investment, measurement input 0.065
Residential Mortgage Loans, Held-for-Investment, at Fair Value | Weighted Average | Prepayment Rate  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans held for investment, measurement input 0.106
Residential Mortgage Loans, Held-for-Investment, at Fair Value | Weighted Average | Delinquency  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans held for investment, measurement input 0.033
Residential Mortgage Loans, Held-for-Investment, at Fair Value | Weighted Average | Loss Severity  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans held for investment, measurement input 0.553
Consumer Loans Held-for-Investment, At Fair Value  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Consumer loans $ 547,795
Consumer Loans Held-for-Investment, At Fair Value | Minimum | Discount Rate  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Consumer loans, held-for-investment, measurement input 0.075
Consumer Loans Held-for-Investment, At Fair Value | Minimum | Prepayment Rate  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Consumer loans, held-for-investment, measurement input 0.223
Consumer Loans Held-for-Investment, At Fair Value | Minimum | Delinquency  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Consumer loans, held-for-investment, measurement input 0.044
Consumer Loans Held-for-Investment, At Fair Value | Minimum | Loss Severity  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Consumer loans, held-for-investment, measurement input 0.660
Consumer Loans Held-for-Investment, At Fair Value | Maximum | Discount Rate  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Consumer loans, held-for-investment, measurement input 0.097
Consumer Loans Held-for-Investment, At Fair Value | Maximum | Prepayment Rate  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Consumer loans, held-for-investment, measurement input 0.341
Consumer Loans Held-for-Investment, At Fair Value | Maximum | Delinquency  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Consumer loans, held-for-investment, measurement input 0.236
Consumer Loans Held-for-Investment, At Fair Value | Maximum | Loss Severity  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Consumer loans, held-for-investment, measurement input 0.924
Consumer Loans Held-for-Investment, At Fair Value | Weighted Average | Discount Rate  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Consumer loans, held-for-investment, measurement input 0.075
Consumer Loans Held-for-Investment, At Fair Value | Weighted Average | Prepayment Rate  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Consumer loans, held-for-investment, measurement input 0.223
Consumer Loans Held-for-Investment, At Fair Value | Weighted Average | Delinquency  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Consumer loans, held-for-investment, measurement input 0.044
Consumer Loans Held-for-Investment, At Fair Value | Weighted Average | Loss Severity  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Consumer loans, held-for-investment, measurement input 0.660
IRLCs  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Derivative, fair value $ 124,382
IRLCs | Minimum | Loan Funding Probability  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Derivative, measurement input 0.000
IRLCs | Minimum | Fair Value of Initial Servicing Rights (Bps)  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Derivative, measurement input 0.00009
IRLCs | Maximum | Loan Funding Probability  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Derivative, measurement input 1.000
IRLCs | Maximum | Fair Value of Initial Servicing Rights (Bps)  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Derivative, measurement input 0.03141
IRLCs | Weighted Average | Loan Funding Probability  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Derivative, measurement input 0.830
IRLCs | Weighted Average | Fair Value of Initial Servicing Rights (Bps)  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Derivative, measurement input 0.01207
Mortgage-Backed Securities Issued  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Securities, fair value $ 798,198
Mortgage-Backed Securities Issued | Minimum | Discount Rate  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Securities, measurement input 0.017
Mortgage-Backed Securities Issued | Minimum | Prepayment Rate  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Securities, measurement input 0.086
Mortgage-Backed Securities Issued | Minimum | Delinquency  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Securities, measurement input 0.003
Mortgage-Backed Securities Issued | Minimum | Loss Severity  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Securities, measurement input 0.200
Mortgage-Backed Securities Issued | Maximum | Discount Rate  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Securities, measurement input 0.059
Mortgage-Backed Securities Issued | Maximum | Prepayment Rate  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Securities, measurement input 0.400
Mortgage-Backed Securities Issued | Maximum | Delinquency  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Securities, measurement input 0.044
Mortgage-Backed Securities Issued | Maximum | Loss Severity  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Securities, measurement input 0.950
Mortgage-Backed Securities Issued | Weighted Average | Discount Rate  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Securities, measurement input 0.025
Mortgage-Backed Securities Issued | Weighted Average | Prepayment Rate  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Securities, measurement input 0.187
Mortgage-Backed Securities Issued | Weighted Average | Delinquency  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Securities, measurement input 0.031
Mortgage-Backed Securities Issued | Weighted Average | Loss Severity  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Securities, measurement input 0.721
Non-Purchased Credit Deteriorated | Residential Mortgage Loans Held-for-Sale, At Fair Value  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans held-for-sale, fair value $ 1,713,431
Non-Purchased Credit Deteriorated | Residential Mortgage Loans Held-for-Sale, At Fair Value | Minimum | Discount Rate  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans held for sale, measurement input 0.028
Non-Purchased Credit Deteriorated | Residential Mortgage Loans Held-for-Sale, At Fair Value | Minimum | Prepayment Rate  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans held for sale, measurement input 0.019
Non-Purchased Credit Deteriorated | Residential Mortgage Loans Held-for-Sale, At Fair Value | Minimum | Delinquency  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans held for sale, measurement input 0
Non-Purchased Credit Deteriorated | Residential Mortgage Loans Held-for-Sale, At Fair Value | Minimum | Loss Severity  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans held for sale, measurement input 0.030
Non-Purchased Credit Deteriorated | Residential Mortgage Loans Held-for-Sale, At Fair Value | Maximum | Discount Rate  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans held for sale, measurement input 0.075
Non-Purchased Credit Deteriorated | Residential Mortgage Loans Held-for-Sale, At Fair Value | Maximum | Prepayment Rate  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans held for sale, measurement input 0.224
Non-Purchased Credit Deteriorated | Residential Mortgage Loans Held-for-Sale, At Fair Value | Maximum | Delinquency  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans held for sale, measurement input 0.158
Non-Purchased Credit Deteriorated | Residential Mortgage Loans Held-for-Sale, At Fair Value | Maximum | Loss Severity  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans held for sale, measurement input 0.500
Non-Purchased Credit Deteriorated | Residential Mortgage Loans Held-for-Sale, At Fair Value | Weighted Average | Discount Rate  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans held for sale, measurement input 0.035
Non-Purchased Credit Deteriorated | Residential Mortgage Loans Held-for-Sale, At Fair Value | Weighted Average | Prepayment Rate  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans held for sale, measurement input 0.138
Non-Purchased Credit Deteriorated | Residential Mortgage Loans Held-for-Sale, At Fair Value | Weighted Average | Delinquency  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans held for sale, measurement input 0.009
Non-Purchased Credit Deteriorated | Residential Mortgage Loans Held-for-Sale, At Fair Value | Weighted Average | Loss Severity  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans held for sale, measurement input 0.206
Originated | Residential Mortgage Loans Held-for-Sale, At Fair Value  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans held-for-sale, fair value $ 109,123
Originated | Residential Mortgage Loans Held-for-Sale, At Fair Value | Discount Rate  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans held for sale, measurement input 0.040
Originated | Residential Mortgage Loans Held-for-Sale, At Fair Value | Prepayment Rate  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans held for sale, measurement input 0.060
Originated | Residential Mortgage Loans Held-for-Sale, At Fair Value | Delinquency  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans held for sale, measurement input 0.030
Originated | Residential Mortgage Loans Held-for-Sale, At Fair Value | Loss Severity  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Loans held for sale, measurement input 0.500